List and Describe the Factors Involved in Initiating Labor Contractions

List and describe the factors involved in initiating labor contractions.

A) Decreasing estrogen levels causes cervical dilation and endometrial contractions.
B) Relaxin causes cervical dilation,fetal weight distorts the myometrium,and the distortion of the cervix and the myometrium triggers release of oxytocin.
C) Inhibin causes cervical dilation,fetal weight distorts the myometrium,and the distortion of the cervix and myometrium triggers the release of prolactin.
D) Relaxin causes cervical dilation,fetal weight distorts the myometrium,and the distortion of the cervix and myometrium triggers the release of inhibin.
E) Falling levels of estrogen and prosterone cause cervical dilation and the shedding of the functional layer which causes myometrial contractions.